Many indoor extension cords are listed at 13 amps (125V). Outdoor and heavy-duty options commonly show 15 amps (125V) and may list maximum wattage values such as 1,875 W.
Indoor cords typically use 16 AWG wiring with two or three conductors. Outdoor or heavy-duty cords more often use 14 AWG with three conductors.
Many cords use three-prong grounded plugs and receptacles (NEMA 5-15) to provide a grounded connection for safety.
Yes. Some models include built-in USB charging—typically two USB ports or a combination of one USB-C and one USB-A—alongside the AC outlets.
Several cords feature flat, low-profile plugs or 360° rotating flat plugs to reduce obstruction behind furniture; some also use angled or flush designs to sit closer to the wall.
Many items are listed to industry standards such as UL, and some listings indicate ETL certification.
Some cords include wall-mount brackets or a built-in hanging loop to keep the cord tidy and secured.
